Fist of the North Star

a.k.a Hokuto No Ken is a Japanese manga series written by Buronson and drawn by Tetsuo Hara that was serialized in Weekly Shonen Jump from 1983 to 1988, spanning 245 chapters, which were initially collected in a 27-volume tankoubon edition by Shueisha. Set in a post-apocalyptic world that has been destroyed by a nuclear war, the story centers around a warrior named Kenshiro, the successor of a deadly martial art style known as Hokuto Shinken, which gives him the ability to kill most adversaries from within through the use of the human body's secret vital points, often resulting in a violent gory death. Kenshiro dedicates his life to fighting against the various ravagers who threaten the lives of the weak and innocent, as well as rival martial artists, including his own "brothers" from the same clan.